Dave,
Nope, they can generate voltage from light too. I didn't believe it either
when I first heard it.. about 40mv last time I checked with a voltmeter (use
one with about 1MOhm/Volt or better). Not a lot, but fairly easy to amplify
with an op-amp or comparator if memory serves. I thi
Dave Mann wrote:
> Patrick White writes:
>> If it hasn't already been suggested, you might try using an LED.
>> They generate a small voltage when light hits them, and I'd bet they
>> have a way faster response to light than the photocell.
> I was under the impression that an LED generates light
, 29 May 2001 19:29:22 +1200
> From: "David A. Mann" <[EMAIL PROTECTED]>
> Subject: Re: Shutter speed testing
>
> Rob Studdert writes:
>
> > What equipment/set up was used to perform the shutter speed tests?
>
> I was saving that for the web page :)
>
Mark Roberts writes:
> This is fascinating because it's pretty much how I was planning on setting up a
> shutter speed tester at home. The main difference is that I was planning on
> using an infrared LED emitter/detector pair (driven by an oscillator) and a
> frequency counter set up as a manual
I was also planning on doing something similar, except that I was going to hook up the
oscillator thingy to a high frequency strobe light attached to my Dick Tracy wrist
radio
using a disco ball to reflect the beam from my high speed 1000gmHzah laser gun.
Norm
Mark Roberts wrote:
> This is fas
This is fascinating because it's pretty much how I was planning on setting up a
shutter speed tester at home. The main difference is that I was planning on
using an infrared LED emitter/detector pair (driven by an oscillator) and a
frequency counter set up as a manually reset event counter. Think
In article <000f01c0e813$edc97740$[EMAIL PROTECTED]> you write:
>Many years ago I read about a method of testing focal plane
>shutter speeds by taking a picture off a tv screen and counting
>scan lines. Does anyone know of this method and how it works? I
>have long since forgotten. Apparently it i
differences depending on if
your TV is PAL or "Never Twice Same Colour" format.
William Robb
- Original Message -
From: "David A. Mann" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: May 29, 2001 1:29 AM
Subject: Re: Shutter speed testing
-
This message is from t
Rob Studdert writes:
> What equipment/set up was used to perform the shutter speed tests?
I was saving that for the web page :)
Basically all I did was shine a low-power laser into the shutter, with a small
silicon photocell on the other side, so the photocell gets lit up while the shutter
Hi all,
I tested the full range of shutter speeds of my Z-1p and two K2's on Sunday.
I haven't got time right now to put up the full results but the general conclusion
is that the Z-1p is dead-accurate from 1/1000 out to 30 seconds (the worst is
about 1/6th-stop out). The faster shutter spe
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